肥牛木中一个新的降新木脂素

Cephalomappa sinensis(Euphorbiaceae) is a monotypic genus ever-green tree endemic to the calcareous mountainous region in southwest of Guangxi Zhuang Autonomous Region.Its fresh branches are used as feeding stuff for cattle,horse,sheep,and can make them strong.To find the possibility of developing feed additive or medicine for livestock,the chemical constituents from this plant were studied.The chemical constituents of its roots had been reported in our earlier papers.In continuation of our investigation on the branches of Cephalomappa sinensis,a new norneolignan,named Ceplignan(1),was isolated from ethanol extract through column chromatography.The structure was elucidated on the basis of spectroscopic evidence.

缬草水提取物的化学成分研究

目的 对缬草Valeriana officinalis水提取物中的化学成分进行研究。方法 运用正相硅胶柱色谱、ODS反相柱色谱、制备高效液相色谱等分离手段进行分离纯化,采用核磁共振、质谱等多种波谱学技术鉴定化合物的化学结构,并采用Griess法评价其对脂多糖诱导的小胶质细胞BV-2神经炎症的抑制活性。结果 从缬草水提取物中分离得到了12个化合物,分别为tinnevellin-8-O-β-D-glucopyranoside(1)、大黄素-8-O-β-D-吡喃葡萄糖苷(2)、(2R,3S)-肥牛木素(3)、左旋橄榄素-9’-O-β-D-吡喃葡萄糖苷(4)、左旋马尾松树脂醇-3a-O-β-D-吡喃葡萄糖苷(5)、金色酰胺醇乙酸酯(6)、松脂素(7)、8-羟基松脂素(8)、松脂素-4-O-β-D-吡喃葡萄糖苷(9)、8,8’-二羟基松脂素-4-O-β-D-吡喃葡萄糖苷(10)、(2S)-橙皮苷(11)和香蜂草苷(12)。结论 化合物1~4和6均为首次从缬草属植物中分离得到。其中,化合物3~4、6、9、11~12在不影响BV-2的细胞活力前提下,可以抑制脂多糖诱导的BV-2细胞神经炎性因子一氧化氮(NO)的产生。